today, general john allen, the top u.s. and nato commander in afghanistan passed the torch to general joseph dumbford. the change of command happens as many question how the united states conducts its national security policy. i want to bring in retired army general barry mccaffrey. good to see you. >> good to be here. >> we should note the general is also the former assistant to the chairman of the joint chiefs as well. for many, the public hearings raised the issue of targeted killings. what effect, if any, will all the talk and scrutiny have on u.s. policy on the ground? >> well, i think it's a legitimate and helpful debate. you do want oversight by congress, you do want there to be known rules. you want to take into account international laws of war. however, we've killed almost 3,000 extremists, terrorist threats to the american people with these drones. these are not law enforcement operations. they are military and cia operations -- >> but general, we've also killed some civilians as well. >> well, i think the collat